LiDAR/SoDAR

Technique

There are two different remote sensing methods for wind measurements: LiDAR (Ligth Detection And Ranging) and SoDAR (Sound Detection And Ranging). In both cases a wave is sent into the atmosphere, and the reflected wave is detected and recorded by the device. The wind speed is calculated using the Doppler shift between the sent wave and the reflected signal. The difference between LiDAR and SoDAR is the type of wave used for measuring: LiDAR uses light which is reflected by aerosol particles in the air, SoDAR uses sound which is reflected by density variations in the air.

Devices

Windhunter offers two types of LiDAR systems, which can be rented as a complete package including power supply, delivery, installation, maintenance and dismantling: a Windcube V2 from Leosphere, and a Zephir 300. Besides our own devices we also offer third-party devices to be rented with our complete service package.

Technical Data

Windcube V2

Zephir 300

Measurement

Range

40 - 200 m

10 - 200 m

Data sampling rate

1s

50 Hz

Number of programable heights

12

10

Speed accuracy

0,1 m/s

-

Speed range

0 - 60 m/s

<1 - 70 m/s

Direction accuracy

2°

-

Elektrical

Power supply

18-28 V DC IN / 93 - 264 VAC 50-60 Hz

12 V DC IN / 90 - 240 V AC 50-60 Hz

Power consumption

45 W

69 W

Environment

Temperature range

-30° +45° C

-40° +50° C

Operating humidity

0-100%

0-100%

Data

Output data

1s/10 min horizontal & vertical wind speed

1 s oder 3 s Winddaten und 10 min-Mittelwerte

Direction

Direction

Temperature

Temperature

Humidity

Humidity

Barometric pressure

Barometric pressure TI

Weight

45 kg

55 kg

Service

Windhunter offers all LiDAR and SoDAR devices as a complete package including power supply, delivery, installation, maintenance and dismantling. We deliver our devices with a customized power supply by PV panels, battery storage, and diesel generator to the site, and we install, test, and commission the devices on site. Measurement device and generator get fenced to prevent theft or vandalism. During the whole measurement campaign we monitor the device from remote. We regularly check the operating and measurement data to detect errors at an early stage and to react accordingly. In case of emergency our teams are always ready to travel to the site and solve the problem on site. By this we can ensure the best possible data availability.

LiDAR/SoDAR

Besides the classical met mast with cub anemometers, which is still recognized as state of the art, the technique of remote sensing is getting more popular amongst the wind industry. Remote sensing devices don’t measure the wind speed directly at the respective measurement height (“in situ”), but from the ground. This technique does not require a met mast, but higher uncertainties have to be considered, especially in complex terrain.